Function serialize_payload_tlv

tests/utils.py:625–645

Encode TLV onion payload for non-final hops, returns bytes

(amount_msat, delay, next_channel, blockheight)

def serialize_payload_tlv(amount_msat, delay, next_channel, blockheight):
    """Encode TLV onion payload for non-final hops, returns bytes"""
    block, tx, out = next_channel.split('x')

    payload = TlvPayload()
    # BOLT #4:
    #     1. type: 2 (`amt_to_forward`)
    #     2. data:
    #         * [`tu64`:`amt_to_forward`]
    payload.add_field(2, tu64_encode(int(amount_msat)))
    # BOLT #4:
    #    1. type: 4 (`outgoing_cltv_value`)
    #    2. data:
    #        * [`tu32`:`outgoing_cltv_value`]
    payload.add_field(4, tu64_encode(blockheight + delay))
    # BOLT #4:
    #    1. type: 6 (`short_channel_id`)
    #    2. data:
    #        * [`short_channel_id`:`short_channel_id`]
    payload.add_field(6, struct.pack("!Q", int(block) << 40 | int(tx) << 16 | int(out)))
    return payload.to_bytes()


def serialize_payload_final_tlv(amount_msat, delay, total_msat, blockheight, payment_secret: str):